US3706059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular magnet
Assignee: Reactor Centrum Nederland
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Filing: 1971-04-12
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Granted: 1972-12-12
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Expires: 1991-04-12
Abstract
Abstract ANNULAR MAGNET COMPOSED OF A PLURALITY OF CYLINDRICAL PERMANENT MAGNETS, WITH SIMILAR POLES POINTING IN THE SAME DIRECTION, AT LEAST ONE OF THESE MAGNETS BEING ROTATABLE AROUND ITS CYLINDER AXIS.
Inventors
- 👤 Frederik H Theyse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0273; H01F7/0278; H01F7/0284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |